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Anyone else's Neumann KH80 randomly reset themselves?

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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby Mike Shand » Sat Dec 26, 2020 6:11 pm

Is this really true? My observation/tests showed no influcence of the standby level and the frequency of sporadic wakeups.

I certainly found the standby level had no apparent influence on frequency of wake ups.
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby air2k » Sat Dec 26, 2020 7:15 pm

blinddrew wrote:Appropos of nothing one of mine just switched itself off mid-playback this arvo. And didn't come back on automatically, had to go round the back and switch off and on.
Although Auto-Standby is enabled? That's strange.

However, I turn Auto-Standby off, then I have the same behavior - but then the KH80 are always-on which I'd like to avoid (but didn't reboot/poweroff so far).
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby blinddrew » Sat Dec 26, 2020 7:57 pm

air2k wrote:
blinddrew wrote:Appropos of nothing one of mine just switched itself off mid-playback this arvo. And didn't come back on automatically, had to go round the back and switch off and on.
Although Auto-Standby is enabled? That's strange.
Yes, first time it's failed to re-awaken, only the second time it's gone to sleep mid play.
If it becomes more regular i'll just switch off the auto-standby.
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby blinddrew » Thu Jan 21, 2021 5:43 pm

Just a quick update to say that they've started turning off whilst playing more frequently so auto-standby has gone off.
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby Hugh Robjohns » Fri Jan 22, 2021 10:42 am

I have to say I am so disappointed with the whole KH80 auto-power saga. It's the kind of thing that is almost impossible to detect in a typical review period, and I'm glad users are reporting the issues here (and elsewhere) -- but they should all really be bombarding Neumann with complaints about this as it's clearly not a design that's fit for purpose. A proper solution is required.

Thankfully, it doesn't affect the speaker's core usability and it remains, of course, a superb sounding monitor speaker, but it does cast a nasty shadow both on the speaker and the manufacturer IMHO.
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby blinddrew » Fri Jan 22, 2021 2:34 pm

Yes, for me it's not really a black mark, more of a smudge. I still have a really nice sounding set of monitors, I just have the first-world-problem of having to manually turn them off. ;)
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby Hugh Robjohns » Fri Jan 22, 2021 3:22 pm

:D Quite.

Neumann presumably added the auto-power mode to comply with the EU green energy requirements, but the poor circuitry implementation means the function won't actually be used and it has downgraded the appeal of the speaker for many to boot! Double whammy... :think:
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby adambier » Sat Jan 23, 2021 12:18 am

Hugh Robjohns wrote::D Quite.

Neumann presumably added the auto-power mode to comply with the EU green energy requirements, but the poor circuitry implementation means the function won't actually be used and it has downgraded the appeal of the speaker for many to boot! Double whammy... :think:

I think that conclusion is inescapable, unfortunately. I ultimately gave up trying to get standby to work on the KH 80s and instead bought one of these (which is a U.S. version but I'm sure there are similar things in the UK and EU):

https://www.amazon.com/gp/product/B005R2UFUG/

My KH 750 sub is connected to the control socket and the KH 80s are set to always-on and connected to the relay sockets.

The KH 750 both has marginally better signal-detection circuitry (probably because there's a third ground) and I'm currently connecting to it via an SPDIF connection, which is even more binary in terms of on or off state.

Note that in order for that approach to work, your interface or other digital source has to either connect via coax or your TOSLINK-to-coax converter has to be smart enough to disconnect voltage from the coax output when no valid audio signal is present on the optical input; many cheap boxes on Amazon will continue to pass ones and zeros over the copper wire anytime the photoelectric sensor is receiving light of any kind.

This item works about 80% of the time (with false wakes maybe 2-3 times a day):

https://www.amazon.com/gp/product/B084T4QDFP/

I've also ordered one of these, which is supposed to be much smarter:

https://www.tindie.com/products/beni_sk ... io-switch/
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby Kayvon » Sat Jan 23, 2021 7:19 pm

Hugh Robjohns wrote:I have to say I am so disappointed with the whole KH80 auto-power saga. It's the kind of thing that is almost impossible to detect in a typical review period, and I'm glad users are reporting the issues here (and elsewhere) -- but they should all really be bombarding Neumann with complaints about this as it's clearly not a design that's fit for purpose. A proper solution is required.

Thankfully, it doesn't affect the speaker's core usability and it remains, of course, a superb sounding monitor speaker, but it does cast a nasty shadow both on the speaker and the manufacturer IMHO.

It would be nice to have some official word at least.

I guess I always coped before (energy bill wise and just the thought that something was sitting there imbibing the Earth's resources) but having had and being reassured by the feature it's bothersome to have to bypass it.

Oh well, i guess in the grand scheme of things it's not even a drop in the ocean in comparison to the energy and resources we will devour over the course of our lifetimes.

It's like a small pout in the right direction and generations to come will collectively and helplessly add to the waste to an obscenely damaging degree before we can learn be respectful and mindful enough to sustain ourselves on this planet without mashing it up.

Makes you wonder about that next vintage remake at the low low.
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Re: Anyone else's Neumann KH80 randomly reset themselves?

Postby melodnb » Sat Jan 30, 2021 2:12 am

I was driven here by word of mouth that someone had found a way to bypass the stupid DSP control requirements of an ipad or the ma-1 mic. Mr. air2k I would pay you to simply develop an app that lets me disable the LED logo. These things are blinding.
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